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Biofuels

Biofuels

The microbial conversion of organic matter into biofuels holds potential as a renewable energy source. Among biofuel sources, microalgae are recognized as a highly efficient and adaptable feedstock for biodiesel production, owing to their rapid biomass accumulation, elevated lipid productivity, and capacity to proliferate in diverse aquatic systems, including freshwater, marine, and wastewater habitats. Unlike terrestrial crops, microalgae do not compete for land and can achieve significantly...

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Benchmark study on algae harvesting with backwashable submerged flat panel membranes.

Tom De Baerdemaeker¹, Bert Lemmens, Chris Dotremont

¹Flemish Institute for Technological Research, VITO, Boeretang 200, 2400 Mol, Belgium. tom.debaerdemaeker@vito.be

Bioresource Technology

|January 1, 2013

Summary

Submerged flat panel membranes efficiently pre-concentrate algae, reducing energy use. Polyvinylidene fluoride (PVDF) membranes with ultrafiltration (UF) and backwashing offer superior performance for algae harvesting.

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Area of Science:

Biotechnology
Environmental Engineering
Materials Science

Background:

Algae harvesting is crucial for biofuel and bioproduct applications.
Centrifugation is energy-intensive, necessitating efficient pre-concentration methods.
Membrane filtration presents a potential alternative for algae dewatering.

Purpose of the Study:

To investigate submerged flat panel membranes for algae pre-concentration.
To evaluate membrane performance and fouling control strategies.
To compare energy consumption with traditional centrifugation.

Main Methods:

Lab-scale testing of submerged flat panel membranes (PVC, PES-PVP, PVDF).
Evaluation of microfiltration (MF) and ultrafiltration (UF) pore sizes.
Comparison of backwashing versus relaxation for fouling control.

Main Results:

Polyvinylidene fluoride (PVDF) membranes exhibited superior performance.
Ultrafiltration (UF) demonstrated enhanced fouling resistance.
Backwashing significantly improved flux (up to 300% higher than benchmark).

Conclusions:

Submerged membrane filtration is a feasible pre-concentration step for algae harvesting.
PVDF UF membranes with backwashing offer an energy-efficient solution.
This method reduces energy consumption compared to centrifugation alone.